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kernel: micro-opt escape_to_root

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Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
This commit is contained in:
backslashxx
2025-08-26 23:17:57 +07:00
committed by ShirkNeko
parent f3f2089a13
commit 3ad2241722
1 changed files with 8 additions and 7 deletions
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15
kernel/core_hook.c
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@@ -230,15 +230,16 @@ static void disable_seccomp(struct task_struct *tsk)
void escape_to_root(void)
{
struct cred *newcreds = prepare_creds();
if (newcreds == NULL) {
pr_err("%s: failed to allocate new cred.\n", __func__);
struct cred *newcreds;
if (current_euid().val == 0) {
pr_warn("Already root, don't escape!\n");
return;
}
if (newcreds->euid.val == 0) {
pr_warn("Already root, don't escape!\n");
abort_creds(newcreds);
newcreds = prepare_creds();
if (newcreds == NULL) {
pr_err("%s: failed to allocate new cred.\n", __func__);
return;
}